package com.liuxing.javaSpringBoot.modules.common.service.impl;

import com.liuxing.javaSpringBoot.config.ResourcesConfigerBean;
import com.liuxing.javaSpringBoot.modules.common.entity.ImageType;
import com.liuxing.javaSpringBoot.modules.common.entity.Result;
import com.liuxing.javaSpringBoot.modules.common.service.ImageService;
import com.liuxing.javaSpringBoot.util.FileUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;

/**
 * Created by IntelliJ IDEA.
 * @File ImageServiceImpl.java
 * @Auth liuxing
 * @Date 2021/8/24 08:56
 * @Email liuxing997@foxmail.com
 */
@Service
public class ImageServiceImpl implements ImageService {
    @Autowired
    private ResourcesConfigerBean configerBean;
    @Value("${artifactId}")
    private String artifactId;

    @Override
    public Result<String> uploadImage(MultipartFile file, String imageType) {

        //判断文件是否为空
        if (file.isEmpty()){
            return new Result<>(Result.ResultCode.FAILED.code, "Image is null.");
        }

        //判断文件是否为图片
        if (!FileUtil.isImage(file)){
            return new Result<>(Result.ResultCode.FAILED.code, "File is not image.");
        }

        //获取图片类型的枚举对象
        ImageType imageTypeMenu = ImageType.getImageTypeByName(imageType);

        //构建目标对象绝对地址 /Users/liuxing/Downloads/upload/ + artifactId + ImageType + 图片名字
        String imageName = String.format("%s.%s",
                System.currentTimeMillis(),
                FileUtil.getFileType(file.getOriginalFilename()));

        String destFolder= String.format("%s%s/%s",
                System.getProperty("os.name").toLowerCase().startsWith("win") ?
                        configerBean.getWindowsLocation() : configerBean.getLinuxLocation(),
                artifactId,
                imageType);

        File destFolderFile = new File(destFolder);
        if (!destFolderFile.exists()) {
            destFolderFile.mkdirs();
        }
        String absolutePath = String.format("%s/%s",
                destFolder,
                imageName);

        //构建目标对象相对地址
        String relatePath = String.format("%s%s/%s/%s",
                configerBean.getPath(),
                artifactId,
                imageType,
                imageName);

        //写图片到目标地址
        try {
            File destFile = new File(absolutePath);
            file.transferTo(destFile);
            //变更图片的尺寸 --- 可选
            FileUtil.changeImageSize(absolutePath, absolutePath,
                    imageTypeMenu.length, imageTypeMenu.height);
            // 返回Result对象
            return new Result<>(Result.ResultCode.SUCCESS.code, "Upload image success.",relatePath);
        } catch (IOException e) {
            e.printStackTrace();
            return new Result<>(Result.ResultCode.FAILED.code, "Upload image failed.");
        }
    }
}
